How to Patch Large Holes in Plaster Walls


If you’re planning to patch large holes in plaster walls, you’ll need to use suitable materials. You’ll need to check to ensure the gap doesn’t have loose plaster, and then you’ll need to clean the area before you begin. You’ll also want to apply a plaster adhesive and lime putty to the repaired area.

Cleaning the patch area

If you are patching a large hole in a plaster wall, the first thing you need to do is clear out any loose or broken plaster. This will help ensure the plaster sticks better. Once it has set, you will be ready to fill the hole and start painting.

An excellent way to begin patching a large hole in a wall is to use a cardboard or other backing strip. You will need a bit of wood to hold it in place and to keep the edges of the wallboard from shifting. You can also use glue or some adhesive to attach it to the wall. If the holes are more significant, you can use aluminum foil or galvanized screening.

Before you begin, wear a pair of safety goggles and a dust mask. The dust emitted during this process can be hazardous to inhale.

Checking for looseness of plaster before making repair

Before making large holes in plaster walls, it is essential to check for looseness. This will make sure that you don’t end up damaging the wall. Many people call a drywall contractor when they have a problem with this type of construction, but you can tackle it yourself.

If the hole is small, you can likely patch it yourself. However, if it’s a large hole, you will need to call a restoration professional.

Before starting any repair project, taking the proper safety precautions is essential. This includes wearing a dust mask and ventilation. You also want to be careful not to damage any plaster or lath underneath.

Plaster can be fragile and will crack if it comes in contact with other materials. This can include wallpaper. Taking these precautions can help you avoid a huge mess.

Applying lime putty

If you have a large hole in your plaster wall, you might think about applying lime putty to fix the problem. This is an effective way to restore your wall’s beauty and functionality and is relatively easy. You need suitable materials.

First, make sure your hole is not causing other structural problems. In some cases, a small crack might not need to be fixed. However, if your wall has a lot of shots, it may be a good idea to have a structural engineer assess your problem.

Next, decide whether you want to use lime or gypsum plaster. You should consider adding a bridging agent like animal hair if you use a lime-based bandage. This will help the mixture adhere to the wood lath. If you want to use a gypsum-based application, you should sand it before applying it.

Applying plaster adhesive

When you need to patch large holes in plaster walls or ceilings, it can be easy to do if you know what to do. You can use cardboard, plasterboard, or even a few sheets of drywall to make a simple repair that looks new. But, if you want a more permanent repair, you can use a unique plaster adhesive that will rebuild the bond between the plaster and the lath.

You will need to sand the area for the first stage of your plaster repair. This can take a long time, so have an air filtration mask handy. After sanding, you can paint the room to match the rest of the walls.

If the hole is tiny, you may be able to fill it with a lime-based plaster mix. However, if the gap is more significant, it will require more work.

Checking for soundproofing

When patching large holes in plaster walls, you’ll need to pay special attention to soundproofing. The key to soundproofing is to keep sound from traveling through the cracks. You can accomplish this with a couple of methods.

First, you’ll need to clean up the hole. This can be accomplished by brushing away any debris. You can also use a putty knife to smooth the surface. If there are hairline cracks in the plaster, you can sand them down. A second option is to apply a layer of elastomeric coating.

Next, you’ll need to mix a plaster that will cure into a solid base. This will serve as the bonding agent for the patch. You can either use a ready-mix joint compound or a liquid bonding agent.